Deleting a file immediately after create it

[dominic]

Hi all,

I'm trying to create a temp file by copying from an existing file, perform
some operation on the temp file, and then delete it.

The code I used is as follow:

// First, to copy the source file to a temp file
File sourceFile = new File("c:\\sourc e.dat");
File destFile = new File("c:\\desti nation.dat");
FileChannel sourceFileChann el = new
FileInputStream (sourceFile).ge tChannel();
FileChannel destFileChannel = new FileInputStream (destFile).getC hannel();
destFileChannel .transferFrom(s ourceFileChanne l, 0,
sourceFileChann el.size());
sourceFileChann el.close();
destFileChannel .close();

// Then I perform certain operations on the file, within different
classes...
// blah blah blah...

// After all, I want to delete the file in another class.
File tempFile = new File("c:\\desti nation.dat");
tempFile.delete ();

At this point, I found an exception telling me that I have no permission to
delete the file.
If I restart the program, I'm able to delete the file within the program;
therefore I suspect the program is locking the file after creating it. Is
there anyway that I can ask the program to release the file so that I can
delete that without restarting the program? I tried to use FilePermission to
grant the delete right to the file, but still not success.

Thanks in advance!

Dominic

[dominic]

Re: Deleting a file immediately after create it

Oops... got an answer for my own question. The file was held in other part
of the program...

--


"dominic" <dominickwan@so fthome.net> wrote in message
news:bgl50v$o06 1@imsp212.netvi gator.com...[color=blue]
> Hi all,
>
> I'm trying to create a temp file by copying from an existing file, perform
> some operation on the temp file, and then delete it.
>
> The code I used is as follow:
>
> // First, to copy the source file to a temp file
> File sourceFile = new File("c:\\sourc e.dat");
> File destFile = new File("c:\\desti nation.dat");
> FileChannel sourceFileChann el = new
> FileInputStream (sourceFile).ge tChannel();
> FileChannel destFileChannel = new FileInputStream (destFile).getC hannel();
> destFileChannel .transferFrom(s ourceFileChanne l, 0,
> sourceFileChann el.size());
> sourceFileChann el.close();
> destFileChannel .close();
>
> // Then I perform certain operations on the file, within different
> classes...
> // blah blah blah...
>
> // After all, I want to delete the file in another class.
> File tempFile = new File("c:\\desti nation.dat");
> tempFile.delete ();
>
> At this point, I found an exception telling me that I have no permission[/color]
to[color=blue]
> delete the file.
> If I restart the program, I'm able to delete the file within the program;
> therefore I suspect the program is locking the file after creating it. Is
> there anyway that I can ask the program to release the file so that I can
> delete that without restarting the program? I tried to use FilePermission[/color]
to[color=blue]
> grant the delete right to the file, but still not success.
>
> Thanks in advance!
>
> Dominic
>
>
>[/color]